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fix: guard capabilities import in agent for stripped-host degradation

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Matches the agent's established try/except import convention; the
agent now starts and reports empty capabilities when utils.capabilities
(or its dependency chain) is unavailable.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in:
James Smith
2026-06-12 11:39:39 +01:00
parent ed496b006c
commit 73e05ed31b
1 changed files with 35 additions and 22 deletions
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intercept_agent.py
+35 -22
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@@ -43,7 +43,12 @@ except ImportError:
HAS_DEPENDENCIES_MODULE = False HAS_DEPENDENCIES_MODULE = False
# Shared capability detection (extracted so app and agent cannot drift) # Shared capability detection (extracted so app and agent cannot drift)
from utils.capabilities import MODE_DEPENDENCY_MAP, detect_interfaces, detect_mode_availability try:
from utils.capabilities import MODE_DEPENDENCY_MAP, detect_interfaces, detect_mode_availability
HAS_CAPABILITIES_MODULE = True
except ImportError:
HAS_CAPABILITIES_MODULE = False
# Import TSCM modules for consistent analysis (same as local mode) # Import TSCM modules for consistent analysis (same as local mode)
try: try:
@@ -420,34 +425,42 @@ class ModeManager:
"tool_details": {}, # Detailed tool status "tool_details": {}, # Detailed tool status
} }
# Detect interfaces via shared capability detection if not HAS_CAPABILITIES_MODULE:
capabilities["interfaces"] = detect_interfaces() # Degrade gracefully on stripped-down hosts where utils.capabilities
# (or its dependency chain) could not be imported.
logger.warning("capability detection unavailable: utils.capabilities could not be imported")
else:
# Detect interfaces via shared capability detection
capabilities["interfaces"] = detect_interfaces()
# Probe dependencies once; reuse for both mode availability and tool_details. # Probe dependencies once; reuse for both mode availability and tool_details.
dep_status: dict | None = None # Note: utils.capabilities imports check_all_dependencies at module level, so if
if HAS_DEPENDENCIES_MODULE: # utils.dependencies were missing, the capabilities import would have failed and
# HAS_CAPABILITIES_MODULE would be False. Inside this True branch, HAS_DEPENDENCIES_MODULE
# is therefore necessarily True as well — the inner guard is not needed.
dep_status: dict | None = None
try: try:
dep_status = check_all_dependencies() dep_status = check_all_dependencies()
except Exception as e: except Exception as e:
logger.warning(f"Tool detail collection failed: {e}") logger.warning(f"Tool detail collection failed: {e}")
# Detect mode availability via shared capability detection # Detect mode availability via shared capability detection
raw_modes = detect_mode_availability(dep_status) raw_modes = detect_mode_availability(dep_status)
for mode, ready in raw_modes.items(): for mode, ready in raw_modes.items():
# Apply this agent's per-mode config gating on top of tool readiness # Apply this agent's per-mode config gating on top of tool readiness
capabilities["modes"][mode] = ready if config.modes_enabled.get(mode, True) else False capabilities["modes"][mode] = ready if config.modes_enabled.get(mode, True) else False
# Populate detailed tool info for modes tracked in dependencies.py # Populate detailed tool info for modes tracked in dependencies.py
if dep_status is not None: if dep_status is not None:
for dep_mode, cap_mode in MODE_DEPENDENCY_MAP.items(): for dep_mode, cap_mode in MODE_DEPENDENCY_MAP.items():
if dep_mode in dep_status: if dep_mode in dep_status:
mode_info = dep_status[dep_mode] mode_info = dep_status[dep_mode]
capabilities["tool_details"][cap_mode] = { capabilities["tool_details"][cap_mode] = {
"name": mode_info["name"], "name": mode_info["name"],
"ready": mode_info["ready"], "ready": mode_info["ready"],
"missing_required": mode_info["missing_required"], "missing_required": mode_info["missing_required"],
"tools": mode_info["tools"], "tools": mode_info["tools"],
} }
# Use Intercept's SDR detection # Use Intercept's SDR detection
sdr_factory = self._get_sdr_factory() sdr_factory = self._get_sdr_factory()